My truck is 2000 4x4, v6 crewcab,frontier, 86kmiles. I think its a 3.3l v6. I did the search function and found some great pictures with great advise but more i can understand tools,reasons why marks are made the better. Ok im assuming the reason you want left and right sprocket to line up on top so you can mark them and see what your doing? If you just slipped a belt off and put the new one on same way it would work but no way to double check to make sure you missed tooth. Where is the mark on lower crank i cant see it in pics. How do you get sprockets to line up above put the truck in gear with 5sp and push it until its right then back in neutral, then proceed to take the old belt off. I think i can do this job with some help more help the better so i can quickly do the job. My wheel bearings took day and half lol running back to the store swap out timken bearing seals for Orielys taiwan ones. Now i could do each side in less than hour including new pads and rotors, wow the pads are easy to change on these nissan cool. Where should i order my parts from would rockauto.com be a good idea or can i get a lifetime made gatorback timing belt?